Telestereotypy



J. H. HAMMOND, JR.

TELESTEREOTYPYI.

APPLICATION man Nov. 30. I942. RENEWED JULY 23,1920. 1 1,370,504, Patented Mar. 1,1921.

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WITNESSES. INVENTOR w i a ATTORNEYS 1. H. HAMMOND, JR.

TELESTEREOTYPY.

APPLICATION FILED NOV. 30. 1912. RENEWED JULY 23.1920. 1,370.504.

L R u 2. 0 H 9 T N 1.! N 0 1 I WT S A v. an m r n B m W4 h UNITED STATES JOHN HAYS HAMMOND, JR., OF GLOUCESTER, MASSACHUSETTS.

TELESTEREOTYPY.

Specification of Letters Patent.

Patented Mar. 1, 1921.

Application filed November 30, 1912, Serial No. 734,270. Renewed July 23, 1920. Serial No. 398,54i3.

T 0 all to 7mm it may concern Be it known that I, Join: HAYS HAM- MONI), Jr., a citizen of the United States, residing at Gloucester, in the State of Massachusetts, have invented certain new and ings Figure 1 shows, in diagrammatic form, a sending station and a receiving station connected by wire, andv embodying one form of my system of tele-stereotypy.

Fig. 2 shows, diagrammatically, a sending station employing radio transmission for one form of my system of tele-stere- P Fig. 3 shows, also dlagrammatlcally, a corresponding radio receiving station for my system of tele-stereotypy.

In Fig. 1, Q is a body whose shape is to be reproduced at a distant station, P, P and P are rods or pins of any suitable form and material, which can move in the direction of their length under the control of the springs S, S and S respectively. The outer ends of these rods are in contact with the body Q, and coincide with points on its surface. U, U and U are contact points attached to the rods P, -P and P and the springs S, S and S respectively, and these points make contact with the electric resistances T, T and T respectively, the amount of resistance in each circuit depending upon the position of the rods P, P and P. F is a high-speed commutator, with contact pieces K, K and K which make contact with the brushes J, J and J respectively, at certain periods in the rotation of commutator F, and which are all connected with the terminal Y, which is in contact with the brush I. K is a contact piece which also makes contact with brush J at another period in the rotation of commutator F and is also connected with terminal Y. There are other contact pieces, not shown, on the commutator F, all connected with the terminal Y, so that each brush J, J- and J makes contact several times during one revolution of the commutator, but so that only one brush is in con tact at a time. V is a battery or other source of current, and WV is a choke coil. V and are both connected, through the line wire X, with the distant receiving station. 0 is an electric motor whichcauses the commutator F to rotate, and which is also connected with the receiving station by means of the line wire X. E and E are ground connections.

O is an electric motor, at the receiving station, running in synchronism with motor O, and rotating high-speed'commutator F in synchronism with commutator F. K K, K and K are contact pieces, all connected with the terminal Y which, in turn, is connected, through the brush 1 and the choke coil with the line wire X to the sending station. The brushes J J* and J make contact with thecontact pieces K K and K respectively, and are in circuit with the electromagnets M, M and M respectively. There are other contact pieces, not shown, on the commutator F all connected with the terminal Y so that each brush J J4 and J makes contact several times during one revolution of the commutator, but so that only one brush is in contact at a time.

.The electromagnets M, M and M when energized, attract the magnetic core pieces, a, a and 02. respectively, which are attached to the rods or pins N, N and N respectively. These rods will assume positions which depend upon the currents in the electromagnets M, M and. M which currents will depend upon the positions of the rods P, P and P atthe sending station. The outer ends of the rods N, -N and N will therefore be caused to constitute points of a surface Q}, which will correspond exactly with the surface of the body Q in contact with the rods P, P and P The springs Z, Z and Z are attached to the rods N, N and N and tend to operate against the attraction of the electromagnets M, M and M respectively, and restore the rods N, N and N to their original ositions when this attraction ceases. is, a ground connection to complete the circuit to the sending station. G is an alternating-current generator which supplies current to the synchronous motors O and 0, connection being made with O by means of the line wire X and the ground connections E and E The choke coil IV and prevent this alternating current from passing through the battery V, the commutators F and F and the rest of the apparatus. D and D are condensers which allow this alternating current to pass through the motors O and 0 but which prevent the direct current, from the battery V, from passing through the motors and O and the generator G and escaping to earth at E and E I Vhen motors O and O are in operation, the commutators F and F rotate synchronously. so that resistance T and electromagnet M, resistance 'I and electromagnet M and resistance T and electromagnet M are successively connected in an electric circuit including the commutators F and F the battery V and the line wire X. The speed of the commutators F and F is so high, and the electrical and mechanical ineitia of the rods N, N and N and the core pieces a, n and n are so great that the interruptions in the circuits will be unnoticeable at the rods N, N and N If a surface such as the lower side of the body Q, be placed upon rods P, P and P the latter will be depressed against the upward pressure of the springs S, S and S the amount of depression depending upon the shape of Q. The resistances T, T and T will therefore be varied correspondingly, and so will the currents in the electromagnets M, M and M The cores and rods a, N, n N and 7?, N will therefore assume positions corresponding to those of the rods P, P and P and if a flexible surface Q be attached to the ends of these rods, it will take a shape like that of the lower side of body Q. The more rods that are used, the closer will be the similarity of the surfaces Q, and Q}, and as many rods may be used a. is convenient and practical. It is evident that not only one surface of the body Q can be reproduced at the receiving station, but that all its surfaces can be so reproduced by arranging rods at its sides and at its top in suitable positions and suitably connected, and having corresponding rods at the receiving station actuated by electromagnets or otherwise. The surfaces at the receiving station, such as Q}, may be made of any suitable material, and may constitute molds in which a solid body can be formed which will be identical with the body at the sending station. It is also evident that raised letters, reliefs and other objects can be re produced at a distant receiving station in a similar manner.

In Fig. 2, H is a source of continuous high-frequency oscillations operatively related to the resonant antenna A by means of the coupling coils L and L The antenna A is connected to ground at E through the variable elements T T and T successively, by the high-speed commutator F the purpose of the variable elements T, T, T being to fix the amplitude of the waves radiated during their period of action, their magnitude depending upon the position of the rods or pins P, P and P Q, is a body whose lower surface is'in contact with the ends ofthe rods P, P and P and depresses them against the action of the springs S S and S respectively. Attached to the rods and springs are contact points U U and U, which make contact with the elements T T and T The elements T T and T are connected, respectively, with the brushes J J and J, which make contact with the contact pieces K, K and K at certain periods of the revolution of the connnutator F Contact piece K also makes contact with the brush J at a certain period of the revolution of commutator F There are other contact pieces, not shown, on the commutator F so that each brush J, J and J3 makes contact several times during one revolution of the commutator, but so that only one brush is in contact at a time. These contact pieces are all connected with the terminal Y which is in contactwith the brush I the latter being, grounded at E. The synchronous motor operates the commutator F.

In Fig. 3, B is a receiving antenna, grounded at E and tuned to the wave length of sending antenna A by means of the inductance coil L and the variable condenser C. The closed oscillation circuit L C comprising the inductance coil L and the variable condenser C is in resonance with the antenna circuit B L C E, and is inductively coupled to the latter by means of the coils L and L The closed oscillatory circuit L C is arranged in a well known manner to act through a condenser D to con' trol a rectifier R through which a unidirectional current is supplied to the controlled circuit containing the commutator F and ,electromagnets M M and M The circuits containing the magnets M M and. M respectively, are tuned so that they will be most strongly energized for certain magnitudesof the elements T T and T The arrangement may be such that when the rod P for instance,.is in its lowest position, the electromagnet M will be most strongly energized, and will cause the core pier-en and the rod N to assume their lowest position.

In the art of radio transmission it is well known that in order to attain efficient tuning it is necessary to have circuits whose electrical oscillation is persistent and slowly dampened. Therefore. in all cases where I have shown detectors it is to be understood that I may employ such detecting devices as present the least ohmic resistance in a circuit.

' The electric motor O is caused to rotate in synchronism with motor 0 of the sending station, by any means well known to the art of radio transmission. This motor O thus rotates the high-speed commutator F in synchronism with commutator F at the sending station. K K, K and K are contact pieces on the commutator F the first three making contact, respectively, with the brushes J J and J, at certain periods in'the rotation of commutator F and con-. tact piece I 15 also making contactwith brush J at another period in the rotation of commutator F .There are other contact pieces, not shown, on the commutator F so that each brush J", J and J makes contact several times during one revolution of the commutator, but so that only one brush is in contact at a time. These contact pieces are all connected with 'the terminal Y which makes contact with the brush I which is connected with rectifier R. The

brushes J J and J are in circuit, respectively, with the electromagnets M M and M which are all connected with the rectifier R. The magnetic coresn a and n are operatively related to the electromagnets M, M and M respectively, and are mechanically connected with the rods or pins N N and N respectively. The cores a a and a will be more or less strongly attracted by the electromagnets M M and M and will thus cause the rods N N and N 5 to assume various positions which will depend upon the positions of the rods P P and P at the sending station of Fig. 2. The outer ends of the rods N N and N will therefore constitute points of a surface Q which will correspond exactly with the surface of the body Q in contact with the ends of the rods P P and P The springs Z Z and Z are attached to the rods N, N and N and tend to operate against the attraction ofthe electromagnets M M and M respectively, and they restore the rods N N and N to their original positions when this attraction ceases.

In a similar manner with Q in Fig. 1, Q may be a flexible surface attached to the ends of rods N N and N, which will conform to the shape of the corresponding surface at the sending station. The more elements like P P and P and N N and N that are used, the closer will be the similarity of the surfaces at the sending and the cations and modifications of system of tele-stereotypy apply to the modifications shown in Figs. 2 and 3, and in general I do not confine myself to the particular appa ratus here shown, but various other changes and modifications, within the skill of those versed in the art, may be made in the particular apparatus shown and described herein, without departing from the spirit of my invention, provided the means set forth in the following claims be employed.

Having thus described my invention, I claim 1. A method for the transmission of forms through a distance which consists in automatically varying a plurality of adjustable mechanical elements at a sending station by bringing the same into contact with a primary surface, varying the amount of electric energy transmitted to a receiving station according to the movement of said elements, and successively controlling a plurality of independent elements at said re ceiving station by electric circuits successively energized by said modified electric energy, so that said receiving elements shall cause the surface atthe sending station to be reproduced at the receiving station.

2. A system for the transmission of forms through a distance comprising a sending station provided with a plurality of independent mechanical elements adapted to have movement imparted thereto by contact with a primary surface, and a plurality of electric elements under the control of said mechanical elements, and a receiving sta tion provided with a plurality of mechanical elements corresponding to the mechanical elements at the sending station and controlled by aplurality of electric elements which are controlled by corresponding electric elements at the sending station, said mechanical receiving elements being adapted to contact with a secondary surface and modify the shape thereof.

3. A system for the transmission of forms through a distance comprising a sending station provided with a plurality of independently movable mechanical elements adapted to contact with and have their movements controlled by the form of an in-' dependent body, and a plurality of electric elements under the control of said mechanical elements, and a receiving station comprising a corresponding number of mechanical elements, each of said elements being electrically controlled by its corresponding element at the sending station, so as to reproduce the position of its corresponding sending element, and adapted to engage with a pliable surface so as to modify the shape thereof.

4. A system for the transmission of forms through a distance comprising a sending station and a receiving station in electric communication with each other, said sending station being provided with a plurality of independent mechanical elements whose positions can be independently fixed by contact with an independent body of the form intended to be transmitted, and a plurality of electric elements under the control of said mechanical elements, and a receiving station provided with a plurality of mechanical elements and a plurality of electrical elements which are controlled by the corresponding elements at the sending station, said mechanical receiving elements having their positions thereby fixed so as to reproduce the shape of the body at the sending station.

5. In a system for the transmission of forms through a distance, a sending station comprising a plurality of mechanical elements capable of independent adjustment by contact with an independent body, and a plurality of electric elements whose respective magnitudes are controlled by said mechanical elements.

6. In a system for the transmission and reception of radiant energy the combination with a sending station comprising a source of electrical oscillations of a given frequency, a transmission conductor associated therewith, and automatic means for successively varying said oscillations, of a receiving station comprising a receiving conductor tuned to said frequency and adapted to receive oscillations of radiant energy from said transmission conductor, a plurality of receiving devices and means for causing said receiving devices to cooperate successively with said receiving conductor.

7. In a system for the transmission and reception of radiant energy the combination with a sending station comprising a source of practically continuous electrical oscillations of a given frequency, a transmission conductor associated therewith, and automatic means cooperating with said conductor for successively varying said oscillations, of a receiving station comprising a receiving conductor tuned to said frequency adapted to receive oscillations of radiant energy from said transmission conductor, a plurality of receiving devices and means synchronized with said first mentioned means for causing said receiving devices to cooperate successively with said receiving conductor.

8. In a system for the transmission and reception of radiant energy, the combination with a sending station comprising a source of practically continuous electrical oscillations, a transmission conductor associated therewith, and automatic means for succescively varying the amplitude of said oscillations, of a receiving station comprising a receiving conductor adapted to receive oscillations of radiant energy from said transmission conductor, a plurality of receiving devices and means synchronized with said first mentioned means for causing said receiving devices to cooperate successively with said receiving conductor.

9. In a system for the transmission and reception of radiant energy, the combination with a sending station comprising a source of practically continuous electrical oscillations of a given frequency, a transmission conductor associated. therewith, and automatic means for successively and intermittently varying the amplitude of said oscillations, of a receiving station comprising a receiving conductor tuned'to said frequency adapted to receive oscillations of radiant energy from said transmission conductor, a plurality of receiving devices and means synchronized with said first mentioned means for causing said receiving devices to cooperate successively and intermittently with said receiving conductor.

10. In a system for thetransmission and reception of radiant energy, the combination with a transmission station comprising means for transmitting electrical oscillations, and means for successively varying the amplitude of said oscillations, of a receiving station comprising a plurality of receiving devices and means synchronized with said second mentioned means for rendering said devices successively effective.

11. In a system for the transmission and reception of radiant energy, the combination with a sending station comprising means for transmitting radiant im ulses, and means for successively varying said impulses at a predetermined frequency, of a receiving station comprising a plurality of receiving devices, and means synchronized with said second mentioned means for rendering said devices successively efiective.

12. In a system for the transmission and reception of radiant energy, the combination with a sending station comprising meansfor transmitting radiant impulses, a pluralityof elements, and means for rencerlng said elements successively effective to modify said impulses at a predetermined frequency, of a receiving station comprising a plurality of receiving devices, and means synchronized with said second mentioned means for rendering said devices successively efi'ective.

13. In a system for the transmission and reception of electric energy, the combination with a sending station comprising a source of electrical oscillations, a sending conductor associated with said source, a plurality of resistances, and means for automatically connecting said resistances successively in series'with said conductor to vary the amplitude of said oscillations, of a receiving station comprising a receiving conductor, a plurality of receiving devices, and means synchronized with said first mentioned means for rendering said devices suctsetse;- 5

cessively effective to cooperate with said. receivin conductor.

14. In asystem for the transmission of electric energy, the combination with a source of electric oscillations, of a conductor associated with said source, a plurality of resistances, and means for automatically connecting said resistances successively in series with said conductor to successively vary the amplitude of said oscillations.

15a In a system for the transmission of forms through a distance, a sending station comprising a plurality of movable elements capable of independent adjustment by contact with an independent body the form of which is intended to be transmitted, and a plurality of electric elements arranged to have their effective magnitudes controlled by saidmovable elements respectively.

16. The combination with means for generating electrical oscillations of a given frequency, of means automatically operative to effect successive variations in the amplitude of said oscillations, and means for receiving said oscillations including a plurality of devices responsive successively to said variations.

17. The combination with means for generating electrical oscillations of a given frequency, of means automatically operative to effect successive variations in the amplitude of said oscillations, and means for receiving said oscillations including movable distributing means synchronized with said variations and a plurality of receiving devices controlled by said distributing means and responsive successively and respectively to said variations.

18. The combination with means for generating electrical oscillations of a given frequency, of means automatically operative to effect variations periodically and at a predetermined rate in the amplitude of said oscillations, and means for receiving said oscillations including a plurality of devices responsive successively to said variations.

19. The combination with means for generating electrical oscillations of a given frequency, of means automatically operative to effect successive variations in the amplitude of said oscillations, and means for receiving said oscillations including movable distributing means synchronized with said variations and a plurality of receiving devices controlled by said distributing means and responsive successively and respectively to said variations.

20. The combination with means for generating electroradiant oscillations of a given frequency, of means automatically operative to effect successive variations in the amplitude of said oscillations, receiving means tuned to said frequency for receiving said oscillations, distributing means operatively connected to said receiving means and synchronized with said second I mentioned means, and a plurality of devices successively cont olled by said distributing means.

21. In, a system for the transmission of forms through a distance, a sending station comprising a plurality of movable elements arranged to be separately adjusted by con' tact with an independent bodythe form of which is intended to be transmitted, a plurality of electric elements arranged to have their effective magnitudes controlled by said.

movable elements respectively, and means for rendering said electrical elements successively effective to control the transmission of energy from said station.

22. In a system for the transmission of forms through a distance, a sending station comprising a plurality of movable elements capable of being independently adjusted by contact with an independentloody the form of which is intended to be transmitted, a

plurality of electric elements arranged to have their effective magnitudes controlled by said movable elements respectively, means for transmitting radiant energy, and means for rendering said elements successively effective to control said energy transsuccessively effective to control said transmission means.

24. In a system for the transmission of forms through a distance, a sending station comprising a plurality of movable elements arranged to be separately adjusted by contact with an independent body the form of which is intended to be transmitted, a plurality of electric elements arranged to have their effective magnitudes controlled by said movable elements respectively, means for rendering said electrical elements successively effective to control the transmission of energy from said station, and a receiving station including a plurality of separately movable elements arranged to be moved as a result of and in accordance with the movements'of said first mentioned elements respectively.

25. In a system for the transmission of forms through a distance, a sending station comprising a plurality of movable elements capable of being independently adjusted by contact with an independent body the form of which is intended to be transmitted, a plurality of electric elements arranged to have their effective magnitudes controlled by said movable elements respectively, means for transmitting radiant energy, means for rendering said elements successively efiective to control said energy transmission means, and a receiving station including a plurality or" separately movable elements arranged to be moved as a result of and in accordance with the movements of said first mentioned elements respectively.

26. In a system for the transmission of forms through a distance, a sending station comprising a plurality of movable elements capable of being independently adjusted by contact with an independent body the form of which is intended to be transmitted,-a plurality of electric elements arranged to have their efi'ective magnitudes controlled by said movable elements respectively, means for transmitting electroradiant energy, means for rendering said elements successively effective to control said transmission means, and a receiving station includ- JOHN HAYS HAMMOND, JR.

In presence of CATHERINE M. CHIsHoLM, MARY K. MoKmNoN. 

